The Interessengemeinschaft 3-Seenbahn e.V. is a German heritage railway located in Schluchsee-Seebrugg in Black Forest. It was founded on 13 January 2008 to prevent the demolition of the former freight yard in Seebrugg. At certain dates all over the year the volunteers organize and operate vintage train rides on the Three Lakes Railway and on the Höllentalbahn In 2008, Deutsche Bahn planned to demolish the abandoned former Seebrugg freight yard. At this time, the station was largely in the state of the 1950s, so eight railway enthusiasts founded a society to save the tracks from being removed. After they managed to stop the demolition and to buy the terrain from DB, they organized first steam train rides in August 2008, which were financed by ten communities near Seebrugg. They started to free the tracks from vegetation. Since 2009, the tracks are passable again. The same year in summer they were first used by steam trains.